docs: def getGroupContentItems(self, groupName):
          """Gets all the items owned by a group(s).
          
          Args:
              groupName (list): The name of the group(s) from which to get items.
          Returns:
              list: A list of items belonging to the group(s).
          Notes:
              If you want to get items from a single group, ``groupName`` can be passed as a :py:obj:`str`.
          See Also:
              :py:func:`getGroupContent` for retrieving all content, not just items.
          
          """
          admin = None
          userCommunity = None
          groupIds = None
          groupId = None
  
          groupContent = None
          result = None
          item = None
          items = []
          try:
              admin = arcrest.manageorg.Administration(securityHandler=self._securityHandler)
  
              userCommunity = admin.community
              groupIds = userCommunity.getGroupIDs(groupNames=groupName)
              #groupContent = admin.query(q="group:" + group_ids , bbox=None, start=1, num=100, sortField=None,
                         #sortOrder="asc")
  
              if not groupIds is None:
                  for groupId in groupIds:
                      groupContent = admin.content.groupContent(groupId=groupId)
                      if 'error' in groupContent:
                          print (groupContent)
                      else:
                          for result in groupContent['items']:
                              item = admin.content.getItem(itemId = result['id'])
                              items.append(item)
              return items
          except:
              line, filename, synerror = trace()
              raise common.ArcRestHelperError({
                          "function": "getGroupContent",
                          "line": line,
                          "filename":  filename,
                          "synerror": synerror,
                                          }
                                  )
          finally:
              admin = None
              userCommunity = None
              groupIds = None
              groupId = None
              groupContent = None
              result = None
              item = None
  
  
              del admin
              del userCommunity
              del groupIds
              del groupId
              del groupContent
              del result
              del item
  
              gc.collect()